Anti-friction alloy



UNITED STATES ATENT OFFICE,

JOHN FOWLER, OF LOUISVILLE, KENTUCKY.

ANTI-FRICTION ALLOY.

SPECIFICATION forming part of Letters Patent No. 474,295, dated May 3,1892.

Application filed October 8, 1891. Serial No 408,205. (No specimens.)

T0 on whom it may concern:

Be it known that-I, JOHN FOWLER, a citizen of the United States, and aresident of Louisville, in the county of Jefferson and State ofKentucky, have invented certain new and useful Improvements inAnti-Friction Alloys; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to a composition of metals especially designed toform an alloy for use in the manufacture of metal bearings and othercastings; and it consists in the following metals combined substantiallyin the proportions specified, although such proportions may be varied:block-tin, thirty-nine and one-half pounds; antimony, eight pounds;copper, four ounces; phosphor-tin, one pound. The phosphor-tin maycontain any suitable per cent. of phosphorus.

I find by adding the phosphor-tin that the metals unite and flow morefreely. It also prevents oxidation to a great extent and gives greaterdurability, strength, and antifriction properties to the castings,whereby it is especially designed for bearings.

- In preparing the alloy the antimony is usually first melted in acrucible. The copper is then added and thoroughly mixed, and While themixture is in a melted state the phosphor-tin is added. WVhen the entiremass becomes thoroughly fused and mixed, it is poured into ingots, whichI term tempermetal. The block-tin is then placed in a crucible andfused, and the temper-metal in proper proportions is added in smallpieces, and the Whole thoroughly mixed and fused, after which it ispoured into ingots or other form.

Having described this invention, what I claim, and desire to secure byLetters Patent, 1s-

1. The herein-described alloy, comprising tin, antimony, copper, andphosphorus, substantially as specified.

2. The process of making the herein-described alloy, which consists infusing antimony, copper, and phosphor-tin, and subsequent] y fusing thealloy formed thereby with block-tin, substantially as specified.

In testimony whereof I affix my signature in presence of two Witnesses.

JOHN FOWLER.

Witnesses:

HAMILTON GRIsWOLD, LEONARD HUBER.

